4718521 has 2 divisors, whose sum is σ = 4718522. Its totient is φ = 4718520.

The previous prime is 4718509. The next prime is 4718531. The reversal of 4718521 is 1258174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4562496 + 156025 = 2136^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 4718521 - 2⁹ = 4718009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4718521.

It is not a weakly prime, because it can be changed into another prime (4718531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2359260 + 2359261.

It is an arithmetic number, because the mean of its divisors is an integer number (2359261).

Almost surely, 2^4718521 is an apocalyptic number.

It is an amenable number.

4718521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4718521 is an equidigital number, since it uses as much as digits as its factorization.

4718521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 28.

The square root of 4718521 is about 2172.2156891064. The cubic root of 4718521 is about 167.7266079679.

The spelling of 4718521 in words is "four million, seven hundred eighteen thousand, five hundred twenty-one".